Add 81/7 and 30/45
1st number: 11 4/7, 2nd number: 30/45
81/7 + 30/45 is 257/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
81/7 = 81 × 45/7 × 45 = 3645/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
30/45 = 30 × 7/45 × 7 = 210/315 - Add the two like fractions:
3645/315 + 210/315 = 3645 + 210/315 = 3855/315 - 3855/315 simplified gives 257/21
- So, 81/7 + 30/45 = 257/21
In mixed form: 125/21
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